Harvey Weinstein long ago picked up the nickname “Harvey Scissorhands” for alleged editing-room meddling. But at the Toronto Film Festival, Dustin Hoffman, director of “Quartet,” said of Weinstein, “His contribution was so valuable . . . it is evident on the screen.” Another alternate take came when “The Master” director Paul Thomas Anderson told the Village Voice of working with Weinstein, “I sort of underestimated that he really knew the script inside and out . . . It was like having P.T. Barnum come into your editing room and say: ‘What the [bleep] is going on? Where’s the dancing girl?’ I’ve learned so much from him, just in the past couple of months that we’ve been dealing with each other.”